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Lithium-Ion Charging Risks in Residential Buildings
A rapidly growing Fire hazard
Electric bikes, scooters and other lithium-ion battery devices are becoming a major fire risk in residential blocks. Fires often occur during charging and can escalate rapidly, producing intense heat and toxic smoke.
Recent UK incidents illustrate the danger:
A London block in Bethnal Green required evacuation after an e-bike caught fire in a communal hallway
In Portsmouth, a charging e-bike caused a tenth-floor fire in a high-rise building, highlighting the importance of sprinkler systems
why lithium-ion batteries are dangerous
Rapid escalation:
Once triggered by damage, overheating or a fault, these batteries can catch fire very quickly.
Intense heat:
Lithium-ion fires burn hotter and are harder to extinguish than typical household fires.
Toxic smoke:
They can produce extremely hazardous gases that complicate evacuation and firefighting.
Thermal runaway:
When a cell fails. it can trigger neighbouring cells to ignite in sequence, a phenomenon fire services call 'thermal runaway'.
Many fires occur during charging, specially when batteries are left unattended, charged overnight, or charged in unsuitable locations such as communal corridors, stairwells or escape routes.
Furthermore, inspectors and fire officers have repeatedly warned that substandard or modified batteries — including cheap imports and DIY conversions — are particularly prone to failure.
Emerging enforcement and Compliance Concerns
Enforcement bodies and fire authorities are paying closer attention to how residential buildings manage these risks. Common issues being flagged include:
The combination of these behaviours and poor control or guidance within buildings is now being viewed as a foreseeable residential fire risk that housing providers must actively manage and document.
What housing providers Should be doing
To protect residents and property, housing associated with lithium-ion batteries, especially in communal areas and escape routes.
Embed battery charging risks in Fire Risk Assessments
Ensure your FRA documents the risks associated with lithium-ion batteries, especially in communal areas and escape routes.
Review and update policies
Make sure tenancy agreements and building policies clearly address safe charging and storage practices.
Educate residents
Provide guidance on safe use, charging and storage of e-bikes, scooters and large battery devices, including: charge only in appropriate locations, use manufacturer-approved chargers and avoid overnight charging, avoid charging unattended, especially when residents are sleep.
Inspect communal areas regularly
Provide guidance on safe use, charging and storage of e-bikes, scooters and large battery devices, including: charge only in appropriate locations, use manufacturer-approved chargers and avoid overnight charging, avoid charging unattended, especially when residents are sleep.
Why this matters now
The frequency and scale of lithium-ion battery fires are rising. Fire services and insurers alike are categorising them as one of the fastest-growing fire risks facing residential properties.
For housing providers who have a duty of care to residents and a legal responsibility under fire safety law, this is not a risk that can be ignored. Proactive assessment, clear policies and robust resident communication will not only reduce fire risk but also demonstrate due diligence in compliance reviews and regulatory inspections.
Protect Your Residents and Property from Lithium-Ion Battery Fires
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